Load Specifications
Bullet Manufacturer:RWS
Bullet Weight:250 gr
Bullet Diameter:0.338"
Bullet Length:<<locked>>
Caliber:8.5 x 55 Blaser load data
Case Length (l3):2.15"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:77 Grains of Water
Primer Size:Large Rifle (LR)
Barrel Length:23.62"
Max. allowed Pressure:62,366 psi
Recommended Twist Rate:1:12.0
Load data in caliber 8.5 x 55 Blaser with .338 | 250gr | RWS Speed Tip Professional bullet and 108 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Power Pro 2000-MR, ReloadSwiss RS 60 and Ramshot Big Game.
Important Notice: DO NOT go below Minimum Charge or above Maximum Charge. Since we have no control over the equipment and components used, any responsibility and liability for the results achieved is rejected.
Only powders/loads that match the current filter criteria are displayed: max pressure of a load ≤ 90% of max. standardized pressure, fill rate ≥ 80% and propellant combustion ≥ 95%. Use the sliders above the tables to adjust these thresholds.
Charge: Powder weight in grains. Start with the minimum load and work up carefully.
FR (Fill Rate): Case fill as a percentage. Values above 100% mean compressed loads.
MaxP / %: Maximum chamber pressure in bar and as a percentage of the standardized maximum for this caliber.
V(0): Muzzle velocity in feet per second (fps) at the standardized barrel length.
z (Powder Burn): Estimated propellant combustion percentage at bullet exit.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 88% | 55,114 psi | 88% | 2316 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 53,534 psi | 86% | 2346 fps | 100% |
| Accurate 2495 | <<locked>> | 94% | 56,362 psi | 90% | 2379 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 55,158 psi | 88% | 2398 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 52,982 psi | 85% | 2333 fps | 96.3% |
| Accurate 4064 | <<locked>> | 96% | 55,738 psi | 89% | 2415 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 47,761 psi | 77% | 2392 fps | 98.8% |
| Accurate LT-30 | <<locked>> | 82% | 54,694 psi | 88% | 2267 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 55,114 psi | 88% | 2290 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 54,143 psi | 87% | 2405 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 96% | 54,868 psi | 88% | 2402 fps | 99.7% |
| ADI AR 2219 | <<locked>> | 82% | 55,477 psi | 89% | 2375 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 88% | 53,417 psi | 86% | 2365 fps | 100% |
| Alliant AR-Comp | <<locked>> | 88% | 53,534 psi | 86% | 2346 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 54,955 psi | 88% | 2454 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 53,200 psi | 85% | 2503 fps | 99.7% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 54,824 psi | 88% | 2418 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 54,317 psi | 87% | 2421 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 84% | 55,201 psi | 89% | 2323 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 55,288 psi | 89% | 2441 fps | 99.8% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 47,355 psi | 76% | 2395 fps | 99% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 54,505 psi | 87% | 2523 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 33,388 psi | 54% | 2169 fps | 96.9% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 53,621 psi | 86% | 2270 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 53,693 psi | 86% | 2421 fps | 99.5% |
| Bofors RP3 | <<locked>> | 96% | 54,636 psi | 88% | 2434 fps | 100% |
| Bofors RP7ᴾ | <<locked>> | 100% | 55,448 psi | 89% | 2405 fps | 97% |
| Hodgdon Benchmark | <<locked>> | 88% | 55,608 psi | 89% | 2352 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 90% | 55,767 psi | 89% | 2438 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 86% | 53,780 psi | 86% | 2474 fps | 99.8% |
| Hodgdon H322 | <<locked>> | 84% | 54,186 psi | 87% | 2359 fps | 100% |
| Hodgdon H335 | <<locked>> | 84% | 55,230 psi | 89% | 2388 fps | 100% |
| Hodgdon H380 | <<locked>> | 96% | 56,304 psi | 90% | 2448 fps | 99.4% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 51,227 psi | 82% | 2434 fps | 97.1% |
| Hodgdon H4350ᴾ | <<locked>> | 100% | 56,188 psi | 90% | 2451 fps | 96.5% |
| Hodgdon H4895 | <<locked>> | 90% | 54,636 psi | 88% | 2415 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 43,395 psi | 70% | 2293 fps | 99.3% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 53,243 psi | 85% | 2444 fps | 100% |
| Hodgdon Superformanceᴾ | <<locked>> | 100% | 52,562 psi | 84% | 2467 fps | 96.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,882 psi | 56% | 1411 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 55,912 psi | 90% | 2418 fps | 100% |
| IMR 3031 | <<locked>> | 90% | 54,215 psi | 87% | 2402 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 54,636 psi | 88% | 2388 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 92% | 55,274 psi | 89% | 2375 fps | 97.6% |
| IMR 4198 | <<locked>> | 84% | 55,622 psi | 89% | 2283 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 48,646 psi | 78% | 2336 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 98% | 54,186 psi | 87% | 2392 fps | 97.3% |
| IMR 4831ᴾ | <<locked>> | 100% | 45,469 psi | 73% | 2343 fps | 98.5% |
| IMR 4895 | <<locked>> | 92% | 53,185 psi | 85% | 2425 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 88% | 53,417 psi | 86% | 2365 fps | 100% |
| Lovex D073.5 | <<locked>> | 84% | 53,592 psi | 86% | 2356 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 53,272 psi | 85% | 2385 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 54,389 psi | 87% | 2346 fps | 99.9% |
| Lovex S062 | <<locked>> | 94% | 54,085 psi | 87% | 2385 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 52,852 psi | 85% | 2382 fps | 98.4% |
| Lovex S070ᴾ | <<locked>> | 100% | 50,183 psi | 80% | 2365 fps | 97% |
| Norma 201 | <<locked>> | 92% | 56,260 psi | 90% | 2402 fps | 100% |
| Norma 202 | <<locked>> | 90% | 53,272 psi | 85% | 2362 fps | 100% |
| Norma 203B | <<locked>> | 94% | 54,433 psi | 87% | 2431 fps | 99.9% |
| Norma URPᴾ | <<locked>> | 100% | 47,558 psi | 76% | 2385 fps | 98.7% |
| Ramshot Big Game | <<locked>> | 94% | 54,694 psi | 88% | 2454 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 46,934 psi | 75% | 2379 fps | 97% |
| Ramshot TAC | <<locked>> | 88% | 53,650 psi | 86% | 2382 fps | 98.6% |
| Ramshot Wild Boar | <<locked>> | 90% | 56,420 psi | 90% | 2441 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 86% | 54,694 psi | 88% | 2372 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,375 psi | 57% | 1447 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 53,040 psi | 85% | 2349 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 53,214 psi | 85% | 2385 fps | 97.8% |
| ReloadSwiss RS 52 | <<locked>> | 92% | 55,216 psi | 89% | 2497 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 54,578 psi | 88% | 2526 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 47,413 psi | 76% | 2411 fps | 98.6% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 48,269 psi | 77% | 2428 fps | 98.2% |
| Rottweil R 901 | <<locked>> | 88% | 54,041 psi | 87% | 2343 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 53,330 psi | 86% | 2356 fps | 100% |
| Rottweil R 903 | <<locked>> | 98% | 54,201 psi | 87% | 2421 fps | 100% |
| Rottweil R 907ᴾ | <<locked>> | 100% | 55,448 psi | 89% | 2405 fps | 97% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 52,852 psi | 85% | 2382 fps | 98.4% |
| Shooters World Match Rifle | <<locked>> | 90% | 53,272 psi | 85% | 2385 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 54,085 psi | 87% | 2385 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 50,183 psi | 80% | 2365 fps | 97% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 56,420 psi | 90% | 2369 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 55,782 psi | 89% | 2388 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 98% | 56,028 psi | 90% | 2477 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 56,217 psi | 90% | 2339 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 90% | 55,288 psi | 89% | 2405 fps | 99.2% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 55,869 psi | 90% | 2428 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 54,868 psi | 88% | 2306 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 54,491 psi | 87% | 2306 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 53,316 psi | 85% | 2343 fps | 97.2% |
| Somchem S321 | <<locked>> | 86% | 54,607 psi | 88% | 2398 fps | 100% |
| Somchem S335 | <<locked>> | 90% | 53,940 psi | 86% | 2306 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 54,839 psi | 88% | 2402 fps | 99.9% |
| Somchem S355 | <<locked>> | 98% | 55,056 psi | 88% | 2425 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 42,380 psi | 68% | 2343 fps | 99.9% |
| Vihtavuori N130 | <<locked>> | 86% | 54,911 psi | 88% | 2277 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 54,853 psi | 88% | 2293 fps | 100% |
| Vihtavuori N135 | <<locked>> | 94% | 55,840 psi | 90% | 2362 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 53,592 psi | 86% | 2343 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 52,924 psi | 85% | 2365 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 50,169 psi | 80% | 2382 fps | 98.9% |
| Vihtavuori N530 | <<locked>> | 88% | 53,853 psi | 86% | 2365 fps | 100% |
| Vihtavuori N540 | <<locked>> | 94% | 55,303 psi | 89% | 2385 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 49,211 psi | 79% | 2388 fps | 98.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 35,375 psi | 57% | 2231 fps | 96.8% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 51,053 psi | 82% | 2372 fps | 99.9% |
| Winchester 748 | <<locked>> | 88% | 53,055 psi | 85% | 2405 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 51,547 psi | 83% | 2441 fps | 97.2% |
| Winchester StaBALL Match | <<locked>> | 92% | 55,593 psi | 89% | 2434 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 43,308 psi | 69% | 2169 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 46,818 psi | 75% | 2257 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 35,665 psi | 57% | 2103 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 42,047 psi | 67% | 2224 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 49,748 psi | 80% | 2287 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 33,765 psi | 54% | 2093 fps | 99.8% |
| Accurate 4350 | <<locked>> | 90% | 33,924 psi | 54% | 2159 fps | 95.6% |
| Accurate LT-30 | <<locked>> | 80% | 51,634 psi | 83% | 2231 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 52,040 psi | 83% | 2251 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 39,755 psi | 64% | 2188 fps | 98.4% |
| ADI AR 2208 | <<locked>> | 80% | 33,823 psi | 54% | 2064 fps | 96% |
| ADI AR 2219 | <<locked>> | 80% | 51,982 psi | 83% | 2333 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 41,742 psi | 67% | 2198 fps | 99.4% |
| Alliant AR-Comp | <<locked>> | 80% | 41,147 psi | 66% | 2192 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 48,457 psi | 78% | 2365 fps | 99.8% |
| Alliant Power Pro 2000-MR | 46.1 gr | 80% | 35,708 psi | 57% | 2201 fps | 96.3% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 40,176 psi | 64% | 2198 fps | 98.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 33,054 psi | 53% | 2083 fps | 97.6% |
| Alliant Reloder-10x | <<locked>> | 80% | 48,762 psi | 78% | 2244 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 35,592 psi | 57% | 2133 fps | 96.9% |
| Alliant Reloder-16 | <<locked>> | 90% | 35,041 psi | 56% | 2169 fps | 95.8% |
| Alliant Reloder-17 | <<locked>> | 82% | 30,313 psi | 49% | 2090 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 96% | 29,747 psi | 48% | 2080 fps | 95.1% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 50,517 psi | 81% | 2234 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 38,580 psi | 62% | 2188 fps | 97.1% |
| Bofors RP3 | <<locked>> | 80% | 32,387 psi | 52% | 2083 fps | 97.5% |
| Bofors RP7 | <<locked>> | 94% | 46,035 psi | 74% | 2270 fps | 95.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 43,656 psi | 70% | 2188 fps | 99.8% |
| Hodgdon BL-C2 | <<locked>> | 80% | 39,842 psi | 64% | 2215 fps | 99.6% |
| Hodgdon CFE223 | <<locked>> | 80% | 43,772 psi | 70% | 2329 fps | 98.8% |
| Hodgdon H322 | <<locked>> | 80% | 47,529 psi | 76% | 2277 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 48,153 psi | 77% | 2300 fps | 100% |
| Hodgdon H380 | <<locked>> | 82% | 35,563 psi | 57% | 2126 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 96% | 45,049 psi | 72% | 2343 fps | 95.7% |
| Hodgdon H4350 | <<locked>> | 96% | 49,530 psi | 79% | 2359 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 40,030 psi | 64% | 2198 fps | 98.8% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 30,168 psi | 48% | 2041 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 35,781 psi | 57% | 2169 fps | 98.4% |
| Hodgdon Superformance | <<locked>> | 98% | 48,950 psi | 78% | 2415 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,034 psi | 42% | 1260 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 38,406 psi | 62% | 2156 fps | 98.5% |
| IMR 3031 | <<locked>> | 80% | 39,059 psi | 63% | 2195 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 35,476 psi | 57% | 2090 fps | 96.8% |
| IMR 4166 Enduron | <<locked>> | 86% | 45,876 psi | 74% | 2241 fps | 95.7% |
| IMR 4198 | <<locked>> | 80% | 49,400 psi | 79% | 2211 fps | 100% |
| IMR 4350 | <<locked>> | 98% | 45,672 psi | 73% | 2290 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 92% | 45,281 psi | 73% | 2260 fps | 95.4% |
| IMR 4831 | <<locked>> | 90% | 33,170 psi | 53% | 2123 fps | 95.3% |
| IMR 4895 | <<locked>> | 80% | 36,434 psi | 58% | 2159 fps | 97.7% |
| IMR 8208 XBR | <<locked>> | 80% | 41,742 psi | 67% | 2198 fps | 99.4% |
| Lovex D073.5 | <<locked>> | 80% | 46,630 psi | 75% | 2267 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 38,203 psi | 61% | 2172 fps | 99.8% |
| Lovex S060 | <<locked>> | 80% | 40,321 psi | 65% | 2139 fps | 98.4% |
| Lovex S062 | <<locked>> | 80% | 35,230 psi | 56% | 2096 fps | 98.5% |
| Lovex S065 | <<locked>> | 90% | 39,088 psi | 63% | 2169 fps | 95.5% |
| Lovex S070 | <<locked>> | 94% | 41,756 psi | 67% | 2234 fps | 95% |
| Norma 201 | <<locked>> | 80% | 38,870 psi | 62% | 2149 fps | 99.1% |
| Norma 202 | <<locked>> | 80% | 39,073 psi | 63% | 2162 fps | 100% |
| Norma 203B | <<locked>> | 80% | 35,012 psi | 56% | 2123 fps | 97.3% |
| Norma URP | <<locked>> | 90% | 34,838 psi | 56% | 2162 fps | 95.6% |
| Ramshot Big Game | 46.1 gr | 80% | 34,316 psi | 55% | 2129 fps | 96.8% |
| Ramshot Hunter | <<locked>> | 96% | 41,191 psi | 66% | 2283 fps | 95.5% |
| Ramshot TAC | <<locked>> | 80% | 41,582 psi | 67% | 2198 fps | 96.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 40,582 psi | 65% | 2215 fps | 98.5% |
| Ramshot X-Terminator | <<locked>> | 80% | 45,049 psi | 72% | 2238 fps | 99% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,339 psi | 42% | 1293 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 46,702 psi | 75% | 2264 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 41,220 psi | 66% | 2205 fps | 95.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 36,724 psi | 59% | 2211 fps | 97.2% |
| ReloadSwiss RS 60 | 45.4 gr | 80% | 30,327 psi | 49% | 2100 fps | 98.3% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 33,939 psi | 54% | 2172 fps | 95% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 39,711 psi | 64% | 2280 fps | 95.9% |
| Rottweil R 901 | <<locked>> | 80% | 42,772 psi | 69% | 2188 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 37,014 psi | 59% | 2110 fps | 98.8% |
| Rottweil R 903 | <<locked>> | 80% | 30,385 psi | 49% | 2034 fps | 96.5% |
| Rottweil R 907 | <<locked>> | 94% | 46,035 psi | 74% | 2270 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 90% | 39,088 psi | 63% | 2169 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 38,203 psi | 61% | 2172 fps | 99.8% |
| Shooters World Precision | <<locked>> | 80% | 35,230 psi | 56% | 2096 fps | 98.5% |
| Shooters World SW4350 | <<locked>> | 94% | 41,756 psi | 67% | 2234 fps | 95% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 49,356 psi | 79% | 2280 fps | 99.9% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 52,112 psi | 84% | 2343 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 31,546 psi | 51% | 2077 fps | 95.8% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 49,559 psi | 79% | 2260 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 39,479 psi | 63% | 2172 fps | 96.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 38,174 psi | 61% | 2162 fps | 98% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 40,495 psi | 65% | 2113 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 33,359 psi | 53% | 2005 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 43,830 psi | 70% | 2211 fps | 95.3% |
| Somchem S321 | <<locked>> | 80% | 44,744 psi | 72% | 2264 fps | 99.8% |
| Somchem S335 | <<locked>> | 80% | 39,958 psi | 64% | 2119 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 39,320 psi | 63% | 2175 fps | 98.2% |
| Somchem S355 | <<locked>> | 80% | 31,459 psi | 50% | 2041 fps | 96.6% |
| Somchem S365 | <<locked>> | 84% | 25,802 psi | 41% | 1982 fps | 95.2% |
| Vihtavuori N130 | <<locked>> | 80% | 45,876 psi | 74% | 2169 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 40,683 psi | 65% | 2113 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 36,085 psi | 58% | 2100 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 36,854 psi | 59% | 2106 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 29,849 psi | 48% | 1991 fps | 97.5% |
| Vihtavuori N160 | <<locked>> | 88% | 34,229 psi | 55% | 2116 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 41,742 psi | 67% | 2195 fps | 99.5% |
| Vihtavuori N540 | <<locked>> | 80% | 35,389 psi | 57% | 2100 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 90% | 35,723 psi | 57% | 2169 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 96% | 31,285 psi | 50% | 2142 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 28,514 psi | 46% | 1969 fps | 95% |
| Winchester 748 | <<locked>> | 80% | 40,669 psi | 65% | 2231 fps | 99.8% |
| Winchester 760 | <<locked>> | 96% | 45,049 psi | 72% | 2343 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 37,275 psi | 60% | 2162 fps | 98.3% |
Recommended = one of the top powders for this cartridge and bullet combination.
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 119 powders for 8.5 x 55 Blaser loaded with the .338 | 250gr | RWS Speed Tip Professional. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,526 fps; across all powders the maximum-charge window runs from 1,411 fps to 2,526 fps. Accurate 3100 gives the best case fill at 100 %, and 119 of the 119 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 48–90 %, leaving at least 10 % headroom. The 250.0 gr projectile in 0.338" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate 4350, ADI AR 2209 reach 100 % fill or more at maximum charge, so these are compressed loads: they need a long drop tube to seat cleanly and react sensitively to the case capacity of your own brass lot. Alliant Power Pro 2000-MR, ReloadSwiss RS 60, Ramshot Big Game rank at the top here: for 8.5 x 55 Blaser with the .338 | 250gr | RWS Speed Tip Professional they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 3100, ADI AR 2209, Alliant Reloder-19 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.